I have a Manual 6sp ls2 with, SC tvs2300, cam, headers, MSD Fuel booster on stock ls2 fuel system...i am in Florida and temperatures have been on the high 90's. When riding the car on the expressway at 70/80mph the coolant temps seem normal at 198 degrees and oil temps at 215/220 but once i got to the streets the coolant temp sky rocket to 240 all the way to 260 in a matter of minutes, notice that this happen as soon as i turn the a/c on....so i shut down the a/c turn off the car and call a towing...opened the hood and notice some very little smoke coming out of the driver side of the hood right by the coolant reservoir and some water coming out of that side dripping to the floor...not from the radiator but the coolant reservoir.
The car has the power to be punish yet i never do at all and when i hit the gas is always will on an open road with plenty of space to play around, that said i never launch the car or beat the crap out of it.
A couple of things could of gone wrong to cause the overheating, 160 temp took a crap, radiator leak (no coolant dripped when i checked it), fans might not be turning on (burned connector??)...
Took the car to Redline Motorsports here in FL and will have it checked next Tuesday, talk to Rich and Howard (owner) and they suggested to check all the small things first and work the way up, they think it could be something minor, also while there seeing so many awesome cars the MODDING BUG hit me we starting talking about meth injection for my car as a good choice of cooling and power to be delivered, i was asked for such kit installed $1750.00
What do you guys think of such overheating issue? Meth, good choice, worth it? Price?

Please Chime in any help would help me greatly


S.C.

 

Maybe the overall engine heat melted something about the cooling system, like a part of pipe or like a fan connector etc. I think its something minor

And for the methanol, I had a supercharged m3 few years back. After few rolling races I was seeing crazy EGT values. A friend suggested I should install a cryo2 system but after a bit of research I went with the meth kit

It really helped me to keep the temps at normal levels. See normally car was only able to do 4-5 pulls but after meth I was able do 10 pulls and still seeing the normal egt values.

But one downside of the meth system is, has to be installed very carefully. A leak turned my friends car to ashes.

but unless you are not racing the car, just having some joyrides 1750$ is a big amount imo

Hope the issue will be fixed shortly

 

Probably a burned fan connector. The smoke you saw was likely steam from the coolant system boiling and overflowing. There is an overflow right below the coolant cap to allow pressure to escape when this happens.

Start the car with the AC off and let it idle for a few seconds. Then turn the AC on. If the coolant fan does not start up in a few seconds, there is something wrong with your fan.

Good luck!

 

Thanks guys for your replies! Hopefully its something small the car did not even run for 40ft while it overheated that said i am sure i didn't do much harm to it but it kind of sucked that i only drive it once maybe twice a week and this happens :/
A faulty connector sounds about right, the 160 stat it is very hard for what i been reading to go bad not that they can't just a harder part to fail and the connector might have been working hard for them to fail and having a root SC and 98 degrees doesn't help so the tuner which will remind nameless might have overclocked them causing for the connectors to burn... Can such connectors be replaced???

 

Great adviced i will try it as soon as i get home

 

Yeah i hope so too... I thought it was kind of high considering that the meth kit ECS ALKY is around the $600, how long can they take to install it i don't know...maybe because of the tune that they have to do after the installation, tunes are going for almost $700 for these cars with such mods as mine..

 

Sorry to hear about your overheating. Did you have the system tuned after all the mods you have done? Could be a number of things, I am sure the shop you have it at will figure it out.


If you don't run your car hard you likely wont need the meth kit. with that said, I suggest you run your car hard more and mod it however you like. to have such a mean machine and not smash that gas pedal and feel that acceleration quite often is a shame. they like to be run, its what they were built for. not saying to do 150mph all the time but 0-60 hard and fast is where all the fun is at, for me anyways.

 

Did you recently replace the thermostat? And this happened after? You could have air pockets That will do this fo sho

 

Sounds like your fans as mentioned. Either the connector melted or a bad ground. I've had this happen twice and it's a quick fix. Meth is a good mod, but will only lower IATs and not coolant temps.

 

You need to have the coolant check for gases in it -

Either you need to do it or suggest it to the shop that they do it - WHY?

Because this will indicate a head gasket leakage "INTO" the coolant system (NOT a blown head gasket like we normally associate things with where water gets into our oil) -

When this happens your coolant temps rise fast and spike into the 260* range, this is a fact, and this is exactly what happened on my buddies FI'd C5 Z06 - the exact same problem - did the test, the test indicated that gases were getting into the cooling system, boiling it and it starts to push it out of the expansion tank -

Pulled the heads and it turned out to be the Drivers side head gasket that had the damage and caused the problem, he must of at one point had some detonation and it was too much and that turned out to be the release point -

It is a inexpensive check to do and worthwhile before you begin to throw too much money at it, you can also find You Tube Videos of how the test is done - Example of the tool: http://www.handsontools.com/UView-56...UaAhz1EALw_wcB

As for Methanol injection, it is worth it, I ran it on my C5 and it is worth every penny you spend www.Alkycontrol.com talk to Julio for your specific application being a PD blower

I hope it is just a busted fan, but you should be able to check your fan operation for the Hi/Lo if it is coming on etc.

Thanks,Matt

 

There is a condition with the c6 at list with my car --if the coolant reservoir is not filled to near the top the coolant will not flow into the radiator allowing coolant level to go very low inside system causing the engine to overheat for no apparent reason.

Easiest way I know to burp the system for air bubbles is to drain about a quart and a half of coolant and remove the two rear steam pipe plugs then fill system till starts to dribble install stem blocks and fill up the reservoir to withing 1/2 inch off the top wait around to let it go down and add as necessary start engine drive around few blocks and check coolant again and for the next couple of times you drive the car.

These two steps will significantly improve cooling system deficiency if after these still overheating cooling system upgrades maybe necessary.

 

Well I took everybody's advice and the car run perfect!!!! Temps as low as 194 on the coolant, took it for a spin around the block with the a/c ON and it run nice and cold, came back to my house filled up again the coolant reservoir and took it on thehighway...man I pushed all those 650whp and it run great even with the a/c ON it was giving me 196*! (Awesome right!)..not for long! :/
Took an exit to return back home and just when I stopped at the light and was getting ready to push it my fraking torque tube (I think) took a s#!&...now I am just waiting on the car for the towing truck to arrive
Anybody can tell me how much this crap will cost Me? Any upgrades can be done? I have a Corvette M6 ls2...
You gotta love them Corvettes, right? Love and hate...

 

Hey man sorry to hear first you need to find out what happened these cars very sturdy check rear axles first.

 

I think it might be the clutch, car it is not engaging at all in 1st, 2nd... all of them gears but the noise is ugly man..check it out:

Watch "Corvette C6 M6 Ls2 torque tube???" on YouTube

 

xBoostx:I changed out my coolant last year and also put in a new 180 stat.The tuner has my fan coming on sooner but it is running a little bit hotter....Question: where are the two rear steam pipe plugs at? I've had my head under my hood many times and never seen them.Thanks

 

Take a look at the steam pipes at front the rears are in same spot on the heads just at the rear.

Best way to spot where the noise comes from on the drive train is to jack up the car on four 3/4 ton jack stands (all the way up) have a body start the engine and engage in reverse or drive while you are under the car cure-full to stay away from spinning tires this way you can spot or even see where is coming from.

If you still can't see or not sure a mechanic's stethoscope from harbor flake will help pin point the noise.

Still I repeat check out the rear axles first for loose bolts interference or play.

NOTE safety first DO NOT EVER trust any floor jack always use jack stands.

https://www.harborfreight.com/mechan...ope-69913.html